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    Re: Role of CN at sea, was Re: Averaging sights ...
    From: Herbert Prinz
    Date: 2004 Oct 12, 18:00 -0400

    Lisa Fiene wrote:
    > We're planning a passage to the Louisiades next season and yes, we'll be
    > taking our morning noon and twilight sights also, plotting them on our
    > sheets, checking our position against the GPS.  Our attitude is that the
    > GPS is a backup, not the other way around.
    I do not see how one can maintain this attitude in the face of reality. In my
    admittedly very limited experience of ten thousand off shore miles over the last
    ten years I have not ONCE been in a situation where GPS didn't work, but cel nav
    would. In fact, I have not once been in a situation at sea where GPS didn't work.
    Full stop. But I have REPEATEDLY been in situations where celestial was
    unavailable for several days in a row and GPS was the only position finding tool
    available. Conclusion: Celestial is not even a backup!
    Herbert Prinz

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